Stratum deformation monitoring device, system and method

Abstract

The present invention relates to a stratum deformation monitoring device. The device includes a working tube having an outer surface and an in-tube space and buried into a target stratum; a plurality of deformation monitoring rings, each of which the plurality of deformation monitoring rings are movably assembled on the outer surface of the working tube in equal intervals or unequal intervals; and at least one strain optical fiber movably assembled on the outer surface of the working tube by securing on the plurality of deformation monitoring rings.

What is claimed is: 
     
       1. A stratum deformation monitoring device, comprising:
 a working tube having an outer surface and an in-tube space and buried into a target stratum; 
 a plurality of deformation monitoring rings, each of which the plurality of deformation monitoring rings are movably assembled on the outer surface of the working tube in equal intervals or unequal intervals; and 
 at least one strain optical fiber movably assembled on the outer surface of the working tube by securing on the plurality of deformation monitoring rings. 
 
     
     
       2. The stratum deformation monitoring device as claimed in  claim 1 , further comprising one of:
 the working tube that is buried into the target stratum by placing into a working well; 
 at least one temperature optical fiber configured in the in-tube space; 
 a plurality of friction enhancers, each of which the plurality of friction enhancers are secured on the at least one strain optical fiber in equal intervals or unequal intervals; 
 a linear track secured on the outer surface of the working tube and providing a linear path, wherein the plurality of deformation monitoring rings is assembled on the linear track to have a linear movement along the linear path, so to be movably assembled on the outer surface of the working tube, wherein the linear path has a longitudinal direction parallel to an axial direction of the working tube; 
 a limiter secured on the outer surface of the working tube and providing a limited moving range, wherein the plurality of deformation monitoring rings is assembled on the limiter to move within the limited moving range, and movably assembled on the outer surface of the working tube; 
 a fiber box configured at a ground surface of the target stratum and storing that least one strain optical fiber and the at least one temperature optical fiber; 
 an analyzer directly or indirectly connected with both end of the at least one strain optical fiber and one end of the at least one temperature optical fiber, to measure a frequency shift sourced from a scattered light in the at least one strain optical fiber and the at least one temperature optical fiber; and 
 a computing device electrically connected with the analyzer and computing a deformation, a strain or a temperature of the target stratum based on a Brillouin optical time domain measurement technology. 
 
     
     
       3. The stratum deformation monitoring device as claimed in  claim 2 , wherein each of the plurality of deformation monitoring rings further comprises one of:
 each of the plurality of deformation monitoring rings has an outer side that directly contacts the target stratum and an inner side; 
 a plurality of friction rings surrounding and protruded from the outer side in a circumferential configuration, and each of the plurality of friction rings has a circumferential surface with a normal line parallel to the axial direction; 
 a plurality of strain optical fiber mounting slots disposed on the outer side, configured in amounts of even-number multiples, parallel to the axial direction and perpendicular to the circumferential configuration; 
 a plurality of slider structure formed on and protruded from the inner side, parallel to the axial direction, perpendicular to the circumferential configuration, moving along the liner path provided by the linear track and constrained by the limiter; and 
 a specific angle cut providing for configuring a backfill material conveying pipe or a conveying pipe. 
 
     
     
       4. The stratum deformation monitoring device as claimed in  claim 2 , wherein the plurality of friction enhancers is buried into the target stratum to increase a friction force between the at least one strain optical fiber and the target stratum. 
     
     
       5. The stratum deformation monitoring device as claimed in  claim 2 , wherein the working tube comprises materials selected from a PVC material, an engineering plastics and a combination thereof and the computing device is a portable computer or a notebook computer. 
     
     
       6. A stratum deformation monitoring system, comprising:
 a working tube having an outer surface and an in-tube space and buried into a target stratum; 
 a plurality of deformation monitoring rings, each of which the plurality of deformation monitoring rings are movably assembled on the outer surface of the working tube in equal intervals or unequal intervals; 
 at least one strain optical fiber movably assembled on the outer surface of the working tube by securing on the plurality of deformation monitoring rings; and 
 an analyzer directly or indirectly connected with both end of the at least one strain optical fiber, to measure a frequency shift sourced from a scattered light in the at least one strain optical fiber. 
 
     
     
       7. The stratum deformation monitoring system as claimed in  claim 6 , further comprising one of:
 the working tube that is buried into the target stratum by placing into a working well; 
 at least one temperature optical fiber configured in the in-tube space; 
 a plurality of friction enhancers, each of which the plurality of friction enhancers are secured on the at least one strain optical fiber in equal intervals or unequal intervals; 
 a fiber box configured at a ground surface of the target stratum and storing that least one strain optical fiber and the at least one temperature optical fiber; 
 the analyzer directly or indirectly connected with the both end of the at least one strain optical fiber and one end of the at least one temperature optical fiber, to measure the frequency shift sourced from the scattered light in the at least one strain optical fiber and the at least one temperature optical fiber; and 
 a computing device electrically connected with the analyzer and computing a deformation, a strain or a temperature of the target stratum based on a Brillouin optical time domain measurement technology. 
 
     
     
       8. A stratum deformation monitoring method, comprising:
 movably assembling a plurality of deformation monitoring rings on an outer surface of a working tube in equal intervals or unequal intervals; 
 securing at least one strain optical fiber on the plurality of deformation monitoring rings to movably assemble the at least one strain optical fiber on the working tube; 
 burring at least the working tube into a target stratum; and 
 measuring a frequency shift sourced from a scattered light in the at least one strain optical fiber to compute a deformation of the target stratum. 
 
     
     
       9. The stratum deformation monitoring method as claimed in  claim 8 , further comprising one of:
 dropping down a temperature optical fiber into the working tube; 
 securing a plurality of friction enhancers on the at least one strain optical fiber in equal intervals or unequal intervals; 
 opening a working well in the target stratum; 
 placing the working tube, the at least one strain optical fiber, the plurality of deformation monitoring rings and the plurality of friction enhancers into the working well; 
 backfilling the working well to bury the working tube, the at least one strain optical fiber, the plurality of deformation monitoring rings and the plurality of friction enhancers in the target stratum; and 
 measuring the frequency shift sourced from the scattered light in the at least one strain optical fiber and the at least one temperature optical fiber to compute the deformation, a strain or a temperature of the target stratum. 
 
     
     
       10. The stratum deformation monitoring method as claimed in  claim 9 , further comprising one of:
 rendering an analyzer to directly or indirectly connect with both end of the at least one strain optical fiber and one end of the at least one temperature optical fiber measure the frequency shift sourced from the scattered light in the at least one strain optical fiber and the at least one temperature optical fiber; and 
 rendering a computing device to connect with the analyzer to compute the deformation, the strain or the temperature of the target stratum based on a Brillouin optical time domain measurement technology.